Speed limiting in electric vehicles
First Claim
1. A method for controlling the speed of a vehicle having an electric motorized drive, the method comprising:
- determining a steady-state torque signal and acceleration or deceleration torque signal of the vehicle traveling down a sloped surface; and
controlling speed of the vehicle when traveling down the sloped surface and when a measured actuator regeneration current exceeds a threshold, the actuator current being generated by a motorized drive arrangement of the vehicle that applies torque to at least one ground-contacting element of the vehicle for braking;
wherein the speed of the vehicle is controlled based on;
the steady-state torque signal;
the acceleration or deceleration torque signal of the vehicle;
a measured actuator regeneration current;
weight of the vehicle and a payload;
the torque applied to the ground-contacting element;
acceleration of the vehicle; and
the speed of the vehicle.
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0 Petitions
Accused Products
Abstract
A controller and methods for controlling the speed of a vehicle having an electric motorized drive is provided. In one embodiment, a method involves determining a steady state average torque and a torque during acceleration or deceleration of the vehicle traveling over an underlying surface. Speed of the vehicle is controlled based on the steady state average torque, the torque during acceleration or deceleration the measured regeneration current generated by a motorized drive arrangement of the vehicle that applies torque to at least one ground-contacting element of the vehicle for traveling over the underlying surface, weight of the vehicle and payload, the torque applied to the ground-contacting element, acceleration of the vehicle and the speed of the vehicle.
222 Citations
15 Claims
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1. A method for controlling the speed of a vehicle having an electric motorized drive, the method comprising:
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determining a steady-state torque signal and acceleration or deceleration torque signal of the vehicle traveling down a sloped surface; and controlling speed of the vehicle when traveling down the sloped surface and when a measured actuator regeneration current exceeds a threshold, the actuator current being generated by a motorized drive arrangement of the vehicle that applies torque to at least one ground-contacting element of the vehicle for braking; wherein the speed of the vehicle is controlled based on; the steady-state torque signal; the acceleration or deceleration torque signal of the vehicle; a measured actuator regeneration current; weight of the vehicle and a payload; the torque applied to the ground-contacting element; acceleration of the vehicle; and the speed of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification